Firearms; Airsoft guns not for recreational use; Firearm attachments, namely, modular external rail systems for firearms; Firearm attachments, namely, modular external rail systems for attaching accessories to firearms; Firearm attachments, namely, mounts for attaching accessories to a firearm; Firearm attachments, namely, mounts for attaching ancillary equipment to a firearm; Firearm attachments, namely, mounts for attaching grips to a firearm; Firearm attachments, namely, mounts for attaching gun sights to a firearm; Firearm attachments, namely, mounts for attaching laser pointing devices to a firearm; Firearm attachments, namely, mounts for attaching lights to a firearm; Firearm attachments, namely, mounts for attaching night vision devices to a firearm; Firearm hand guards; Firearm slings; Firearm tactical rails; Bipods for firearms; Monopods for firearms; Safety catches for firearms; Sights, namely, open sights for use on firearms; Sights, other than telescopic sights, for firearms; Silencers for firearms; Sling straps for firearms; Stands for firearms; Tripods and stands for firearms